I never had issues on froyo or stock GB, nor on cranium 3.1 (kph) or cranium 5.1 (kpq). I only had it on cm7. thanks to this thread, I discovered I forgot to uncheck background data, and just to be sure, I also deleted the backup transport. I then recharged my phone and reset it to clear the current stats. my stats at the moment are:

95% battery remaning after 4 hours

39% used by cell standby (1.95%)
30% used by android OS (1.5%)
16% used by phone idle (0.8%)
9% used by display (0.45%)
5% used by voice calls (0.25%)
3% used by andrpid system (0.15%)

Google backup feature doesn't work for me either. Used other apps like MyBackPro for contacts and sms and Titanim for apps.
Anyway I deleted google backup transport. will update the feedback soon.
thanks!

Couldn't find Google backup transport lg optimus 2x phone bro and there's no such file in system app I searched with root explorer this file is not in phone also but I'm having this problem ..bought new battery also still my battery sucks in standby mode same as I'm using it like 10% per hour any solution bro..suspend sucks battery but there's no application running

EDIT: The % of Android OS is gradually dropping and it's now only 12% vs screen on at 30%... Probably because I was having screen on.

UPDATE: New cycle drained 5% after 1 hr plus. And android OS took 51% of it, it hit 60% the other day. O_O

So I tried googling and found a very simple suggestion, which is to wipe cache in recovery mode. So i did that and rebooted. The Android OS took only 12% instead of 50% now. I'm leaving it on for some time and will report back if it recurs.

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